Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac46bb53fc654688…

MALICIOUS

PDF

120.7 KB Created: 2021-04-01 23:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 09e01f47b2540b7b1a498c29087a58b2 SHA-1: 56d5cf704db202b7e10050084dced66e2b37ac83 SHA-256: ac46bb53fc654688b8c4e4d5319cd3836df98c906cdcbe0ee8a01806052e2d88
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'https://druttle.ru/123?utm_term=hominid+evolution+timeline+worksheet', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Hominid evolution timeline worksheet'. No scripts were extracted, but the presence of an external URI and the phishing classification strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/123?utm_term=hominid+evolution+timeline+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374986/normal_6037a4658eff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_603de2e76b385.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/Emje843/41571755744.pdfIn PDF document text
    • http://zagavuxowipoj.22web.org/uniformity_meaning_in_marathi.pdfIn PDF document text
    • http://huseyincanx.com/pemetvqgl9.pdfIn PDF document text
    • http://itali-big.space/70853732361ewcq3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5fe33359ebc7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_5ff03d22b82a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_60140318461f7.pdfIn PDF document text
    • https://cdn.sqhk.co/madozozafi/sibhjhx/mafia_the_city_of_lost_heaven_titanic_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/fjaGhaj/s2d_multiplayer_mod_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nisifibuvez.epizy.com/restricted_boltzmann_machine_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/hypertension_icd_10_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/ac_market_4._0._5.pdfIn PDF document text
    • http://zerakunutage.epizy.com/viwazifego.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_much_do_runescape_bonds_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/merchant_of_venice_act_1_scene_3_questions_and_answers_icse_hub.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/gotesoxazijasatasim.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/43122870527.pdfIn PDF document text
    • http://fazodavevonexo.rf.gd/17633497030.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/banob.pdfIn PDF document text
    • http://mitufesidu.epizy.com/aptitude_questions_and_answers_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/69313076040.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B2F 4916 bytes
SHA-256: 6e83ce9f9aee1731b46200dde1cb00902565de65bfad1c38983bfa624bd9e4ff
font_01_sfnt_off00019bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BC2 13636 bytes
SHA-256: 1a0f39715f509828700dfaa9de0ceb5bcb068c752949b855447beba8b329cdb6
font_02_sfnt_off0001c691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C691 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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